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Cystine, Quantitative, 24 hour urine

Item Value
Approval req'd? No
Available Stat? No
Test code CUQNT
Test group Cystine
Performed by Quest
Sendout? Yes
Method LC/MS
Collection Instructions Keep collection container refrigerated during 24 hr. collection. Take collection to the laboratory as soon as possible on the second day for processing by the laboratory.

Note: patient should not have IVP in the 48 hours preceding the start of the collection or during the collection.
Container type 24 hour urine collection container

Click here for Urine Preservative Requirements
Amount to Collect Entire 24 hour urine output.
Sample type 24 hour urine collection
Preferred volume 10 mL urine
Min. Volume 2 mL urine
UCSF Rejection Criteria Sample received unrefrigerated.
Processing notes Process sample immediately upon receipt. Record total volume in mL (based on weight in grams), mix well, prepare aliquot and freeze at -20C.
Ref Lab Rejection Criteria pH < 2.0 upon receipt. Sample received unfrozen.
Units µmol/24 hours
Normal range
0-9 years 6-48 µmol/24 hours
10-13 years 10-94 µmol/24 hours
14-17 years 17-102 µmol/24 hours
> 17 years 24-184 µmol/24 hours
Stability Frozen 2 months.
Turn around times Set up 2x per week. Turnaround 5-10 days
CPT coding 82131-90
Last Updated 4/13/2012 2:25:49 PM
Entry Number 1352
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